Tiffany DeJesus, a 29-year old resident of Wallington, has been charged with aggravated assault in connection with the Nov. 1 incident, Carlstadt Chief Thomas Nielsen said in a release. DeJesus was employed as a chemist at Sonar Products Inc. in Carlstadt, a privately-owned pharmaceutical and cosmetic manufacturing facility, police said.

A supervisor had allegedly observed a video of DeJesus putting methanol, commonly used in antifreeze, into a coworker's coffee, Carlstadt Det. John Cleary said. The chemist was also accused of spraying Trichloroacetic acid, which is used to chemically peel skin, on the same employee's coat, purse and workspace. These substances were part of the company's inventory, authorities said.

The victim was transported to Hackensack University Medical Center as a precaution and remained there overnight to undergo blood tests, Cleary said. Potential dangers posed by methanol consumption include liver and kidney failure. The victim was later released from the hospital.

DeJesus and the employee had a minor dispute back in April, but authorities believe she was a disgruntled employee and her actions were aimed at the company in general.

"We believe it was more of an attack against the company," Cleary said, adding she was upset with her work environment.

The Bergen County Prosecutor's Office Major Crimes Unit and Carlstadt Det. Sgt. David Smith conducted the investigation.

As a result of her alleged actions, DeJesus has since been fired from her job, Chief Nielsen reported.

DeJesus is currently free on $10,000 bond. She is scheduled to appear in municipal court in early December, authorities said.

"As a chemist, she would be well aware of what these substances can do," Cleary said.